//
//  YXOauthViewController.swift
//  YXweibo
//
//  Created by AS on 5/12/16.
//  Copyright © 2016 AS. All rights reserved.
//

import UIKit
import SVProgressHUD
class YXOauthViewController: UIViewController {

    override func loadView() {
        view = webView
        webView.delegate = self
    }
    override func viewDidLoad() {
        super.viewDidLoad()

        self.view.backgroundColor = GlobalBKGColor
        
        // 设置导航栏
        // 左边
        navigationItem.leftBarButtonItem = UIBarButtonItem(title: "填充", style: UIBarButtonItemStyle.Plain, target: self, action:"autoFill")
        navigationItem.rightBarButtonItem = UIBarButtonItem(title: "取消", style: UIBarButtonItemStyle.Plain, target: self, action:"cancel")
        // title
        navigationItem.title = "登录"
        
        // 使用WebView加载登录界面
        let urlString = oauthURLString + "?client_id=" + client_id + "&redirect_uri=" + redirect_uri
        let url = NSURL(string: urlString)
        let request = NSURLRequest(URL: url!)
        webView.loadRequest(request)
        
        
        // 加指示器,显示正在加载
        // SVProgressHUD.showErrorWithStatus(status: String!) 显示错误
        //        SVProgressHUD.showInfoWithStatus("正在加载") // 提示信息感叹号,会自动关闭
        // 进度形式,如果不主动关闭,会一直存在
        SVProgressHUD.showWithStatus("正在加载")
        
    }
    

   //MARK:- 按钮点击事件
   @objc private func autoFill()
    {
       
         let jsString = "document.getElementById('userId').value='18692261502';document.getElementById('passwd').value='Tangtang00';"
        // 使用WebView执行JS代码
        webView.stringByEvaluatingJavaScriptFromString(jsString)
    }
   @objc private func cancel()
    {
        SVProgressHUD.dismiss()
        dismissViewControllerAnimated(true, completion: nil)
        
    }
    // MARK: - 懒加载
    /// webView
    private lazy var webView:UIWebView = UIWebView()

}
/**
 *  遵守协议
 */
extension YXOauthViewController:UIWebViewDelegate{
    /// webView加载完成调用
    func webViewDidFinishLoad(webView: UIWebView) {
        SVProgressHUD.dismiss()
    }
    
    // webView加载网页的时候回调用这个方法,加载一次回调一次,询问我们是否要加载某个请求
    // return true可以加载这个界面
    // teturn false就不加载
    
    func webView(webView: UIWebView, shouldStartLoadWithRequest request: NSURLRequest, navigationType: UIWebViewNavigationType) -> Bool {
        let url = request.URL!
        
        YXPrint(items: "request:\(url.absoluteString)")
        if !url.absoluteString.hasPrefix(redirect_uri) {
            // 只要不是授权回调地址,是新浪的界面,就让他去加载
            return true

        }else{
            // 是授权回调地址,点击的是取消或授权,不让他去加载,我们自己来做一些事情
            // URL的query: ?后面的东西
            let query = url.query!
            YXPrint(items: "query:\(query)")
            let codeString = "code="
            if  query.hasPrefix(codeString){
                // 如果query 是以 code=开头表示点击的授权按钮
                // 从query中截取code的值,substringFromIndex从指定位置截取到最后
                let code = (query as NSString).substringFromIndex(codeString.characters.count)
                YXPrint(items: "code:\(code)")
                
                 /// 加载AccessToken,字典转模型,模型保存到沙盒
                YXUserAccountViewModel.sharedInstance.loadAccessToken(code,callback: {(error)->()in
                    
                    if error != nil
                    {
                         // 出现了错误
                          YXPrint(items: "出现了错误: \(error)")
                        SVProgressHUD.showErrorWithStatus("您的网络不给力...")
                        
                        // 延迟一秒关闭
                        
                        dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (Int64)(1 * NSEC_PER_SEC)), dispatch_get_main_queue(), {()->Void in
                            self.cancel()
    
                   })
                    
                    }else
                    {
                        // 没有错误
                        self.cancel()
                        // 跳转到YXWelcomeViewCotroller
                        // 调用AppDelegate的switchRootViewContriller
                        let appDelegate = UIApplication.sharedApplication().delegate as!AppDelegate
                        appDelegate.switchRootViewController(YXWelcomeViewController())
                    }
                    })
            }
            else
            {
                // 点击的是取消按钮
                cancel()
            }
            return false
        }
        
    }
}
